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- Description
- Specifications
AT127B is a 32 GB (4 x 8 GB) single rank PC3L-12800 (DDR3-1600) registered CAS-11 memory module for the CB900s blades of the HPE Integrity Superdome 2. The spare number for one of its DIMMs is 879283-001, an 8GB PC3L 12800R registered DDR3L SDRAM DIMM organized as 1Gx72.
The blades take 8 GB single rank PC3L-12800R DDR3 ECC registered DIMMs, and 8 GB and 16 GB low voltage DIMMs are supported on CB900s i6 blades. A blade carries 32 registered DIMMs with eight Intel Scalable Memory Buffer chips, which is eight DIMMs and two buffer chips for each memory controller. Memory protection is ECC on memory and caches plus double-chip spare.
Different DIMM sizes cannot be mixed within one blade, for example AT127B with the 64 GB AT128A, and different densities cannot be mixed either, for example AT127A with AT127B. Separate blades in one system can use different DIMM sizes, so one blade may hold all 8 GB DIMMs while another holds all 16 GB DIMMs.
The recommended configurations with 8 GB DIMMs are 8 DIMMs for 64 GB, 16 DIMMs for 128 GB, 24 DIMMs for 192 GB and 32 DIMMs for 256 GB. DIMM positions are loaded in the sequence A, B, C, D, and the A and B connectors are white while C and D are black. The minimum for the 8-socket and 16-socket Superdome 2 is 32 GB (4 x 8 GB).
| Designation | AT127B |
| Manufacturer | HPE |
| Type | Registered memory module |
| Capacity | 32 GB |
| DIMMs | 4 x 8 GB |
| Rank | Single |
| Speed | PC3L-12800 (DDR3-1600), CAS-11 |
| Spare DIMM | 879283-001 (8GB PC3L 12800R) |
| Blades | Superdome 2 CB900s |
| Memory protection | ECC, double-chip spare |
| Same-blade mixing with AT128A or AT127A | Not supported |